diff --git a/.gitignore b/.gitignore
index 0bfa83c..47fffd7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,3 +20,9 @@ bin/
 
 # Go workspace file
 go.work
+
+#output file
+*.txt
+
+#tmp folder which contains .yaml files
+tmp/
\ No newline at end of file
diff --git a/api/types/metric.go b/api/types/metric.go
index 69aab68..9ec36e5 100644
--- a/api/types/metric.go
+++ b/api/types/metric.go
@@ -6,16 +6,17 @@ import "time"
 type ResponseStats struct {
 	// Total represents total number of requests.
 	Total int
-	// Failures represents number of failure request.
-	Failures int
+	// List of failures
+	FailureList []error
 	// Duration means the time of benchmark.
 	Duration time.Duration
-	// Latencies represents the latency distribution in seconds.
+	// PercentileLatencies represents the latency distribution in seconds.
 	//
 	// NOTE: The key represents quantile.
-	Latencies map[float64]float64
+	PercentileLatencies map[float64]float64
+	// total bytes read from apiserver
+	TotalReceivedBytes int64
 	// TODO:
-	// 1. Support total read/upload bytes
-	// 2. Support failures partitioned by http code and verb
-	// 3. Support to dump all latency data
+	// 1. Support failures partitioned by http code and verb
+	// 2. Support to dump all latency data
 }
diff --git a/cmd/kperf/commands/root.go b/cmd/kperf/commands/root.go
index 6bac055..144f08d 100644
--- a/cmd/kperf/commands/root.go
+++ b/cmd/kperf/commands/root.go
@@ -3,6 +3,7 @@ package commands
 import (
 	"github.com/Azure/kperf/cmd/kperf/commands/multirunners"
 	"github.com/Azure/kperf/cmd/kperf/commands/runner"
+	"github.com/Azure/kperf/cmd/kperf/commands/virtualcluster"
 
 	"github.com/urfave/cli"
 )
@@ -15,6 +16,7 @@ func App() *cli.App {
 		Commands: []cli.Command{
 			runner.Command,
 			multirunners.Command,
+			virtualcluster.Command,
 		},
 	}
 }
diff --git a/cmd/kperf/commands/runner/runner.go b/cmd/kperf/commands/runner/runner.go
index 496fbbd..b466e0c 100644
--- a/cmd/kperf/commands/runner/runner.go
+++ b/cmd/kperf/commands/runner/runner.go
@@ -3,8 +3,11 @@ package runner
 import (
 	"context"
 	"fmt"
+	"log"
+	"math"
 	"os"
 	"sort"
+	"strconv"
 
 	"github.com/Azure/kperf/api/types"
 	"github.com/Azure/kperf/request"
@@ -53,6 +56,10 @@ var runCommand = cli.Command{
 			Name:  "user-agent",
 			Usage: "User Agent",
 		},
+		cli.StringFlag{
+			Name:  "result",
+			Usage: "Path to the file which stores results",
+		},
 	},
 	Action: func(cliCtx *cli.Context) error {
 		profileCfg, err := loadConfig(cliCtx)
@@ -62,6 +69,7 @@ var runCommand = cli.Command{
 
 		kubeCfgPath := cliCtx.String("kubeconfig")
 		userAgent := cliCtx.String("user-agent")
+		outputFile := cliCtx.String("result")
 
 		conns := profileCfg.Spec.Conns
 		rate := profileCfg.Spec.Rate
@@ -74,7 +82,13 @@ var runCommand = cli.Command{
 		if err != nil {
 			return err
 		}
-		printResponseStats(stats)
+
+		if outputFile != "" {
+			writeToFile(stats, outputFile)
+		} else {
+			printResponseStats(stats)
+		}
+
 		return nil
 	},
 }
@@ -95,11 +109,15 @@ func loadConfig(cliCtx *cli.Context) (*types.LoadProfile, error) {
 	}
 
 	// override value by flags
-	//
-	// TODO(weifu): do not override if flag is not set
-	profileCfg.Spec.Rate = cliCtx.Int("rate")
-	profileCfg.Spec.Conns = cliCtx.Int("conns")
-	profileCfg.Spec.Total = cliCtx.Int("total")
+	if v := "rate"; cliCtx.IsSet(v) {
+		profileCfg.Spec.Rate = cliCtx.Int(v)
+	}
+	if v := "conns"; cliCtx.IsSet(v) || profileCfg.Spec.Conns == 0 {
+		profileCfg.Spec.Conns = cliCtx.Int(v)
+	}
+	if v := "total"; cliCtx.IsSet(v) || profileCfg.Spec.Total == 0 {
+		profileCfg.Spec.Total = cliCtx.Int(v)
+	}
 
 	if err := profileCfg.Validate(); err != nil {
 		return nil, err
@@ -111,18 +129,75 @@ func loadConfig(cliCtx *cli.Context) (*types.LoadProfile, error) {
 func printResponseStats(stats *types.ResponseStats) {
 	fmt.Println("Response stat:")
 	fmt.Printf("  Total: %v\n", stats.Total)
-	fmt.Printf("  Failures: %v\n", stats.Failures)
+	fmt.Printf("  Total Failures: %v\n", len(stats.FailureList))
+	for _, v := range stats.FailureList {
+		fmt.Printf("  Failure: %v\n", v)
+	}
+	fmt.Printf("  Observed Bytes: %v\n", stats.TotalReceivedBytes)
 	fmt.Printf("  Duration: %v\n", stats.Duration)
 	fmt.Printf("  Requests/sec: %.2f\n", float64(stats.Total)/stats.Duration.Seconds())
 
 	fmt.Println("  Latency Distribution:")
-	keys := make([]float64, 0, len(stats.Latencies))
-	for q := range stats.Latencies {
+	keys := make([]float64, 0, len(stats.PercentileLatencies))
+	for q := range stats.PercentileLatencies {
+		keys = append(keys, q)
+	}
+
+	sort.Float64s(keys)
+
+	for _, q := range keys {
+		fmt.Printf("    [%.2f] %.3fs\n", q/100.0, stats.PercentileLatencies[q])
+	}
+}
+
+func writeToFile(stats *types.ResponseStats, outputFile string) {
+
+	f, err := os.Create(outputFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+	// remember to close the file
+	defer f.Close()
+
+	//write Total requests
+	f.WriteString("Response Stat: " + strconv.Itoa(stats.Total) + "\n")
+	_, err = f.WriteString("  Total: " + strconv.Itoa(stats.Total) + "\n")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	_, err = f.WriteString("  Total Failures: " + strconv.Itoa(len(stats.FailureList)) + "\n")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	_, err = f.WriteString("  Observed Bytes: " + strconv.FormatInt(stats.TotalReceivedBytes, 10) + "\n")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	_, err = f.WriteString("  Duration: " + stats.Duration.String() + "\n")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	requestsPerSec := float64(stats.Total) / stats.Duration.Seconds()
+	roundedNumber := math.Round(requestsPerSec*100) / 100
+	_, err = f.WriteString("  Requests/sec: " + strconv.FormatFloat(roundedNumber, 'f', -1, 64) + "\n")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	f.WriteString("  Latency Distribution:\n")
+	keys := make([]float64, 0, len(stats.PercentileLatencies))
+	for q := range stats.PercentileLatencies {
 		keys = append(keys, q)
 	}
+
 	sort.Float64s(keys)
 
 	for _, q := range keys {
-		fmt.Printf("    [%.2f] %.3fs\n", q, stats.Latencies[q])
+		str := fmt.Sprintf("    [%.2f] %.3fs\n", q/100.0, stats.PercentileLatencies[q])
+		f.WriteString(str)
 	}
 }
diff --git a/cmd/kperf/commands/virtualcluster/nodepool.go b/cmd/kperf/commands/virtualcluster/nodepool.go
new file mode 100644
index 0000000..2c64a90
--- /dev/null
+++ b/cmd/kperf/commands/virtualcluster/nodepool.go
@@ -0,0 +1,67 @@
+package virtualcluster
+
+import (
+	"fmt"
+
+	"github.com/urfave/cli"
+)
+
+var nodepoolCommand = cli.Command{
+	Name:  "nodepool",
+	Usage: "Manage virtual node pools",
+	Flags: []cli.Flag{
+		cli.StringFlag{
+			Name:  "kubeconfig",
+			Usage: "Path to the kubeconfig file",
+		},
+	},
+	Subcommands: []cli.Command{
+		nodepoolAddCommand,
+		nodepoolDelCommand,
+		nodepoolListCommand,
+	},
+}
+
+var nodepoolAddCommand = cli.Command{
+	Name:      "add",
+	Usage:     "Add a virtual node pool",
+	ArgsUsage: "NAME",
+	Flags: []cli.Flag{
+		cli.IntFlag{
+			Name:  "nodes",
+			Usage: "The number of virtual nodes",
+			Value: 10,
+		},
+		cli.IntFlag{
+			Name:  "cpu",
+			Usage: "The allocatable CPU resource per node",
+			Value: 8,
+		},
+		cli.IntFlag{
+			Name:  "memory",
+			Usage: "The allocatable Memory resource per node (GiB)",
+			Value: 16,
+		},
+	},
+	Action: func(cliCtx *cli.Context) error {
+		return fmt.Errorf("nodepool add - not implemented")
+	},
+}
+
+var nodepoolDelCommand = cli.Command{
+	Name:      "delete",
+	ShortName: "del",
+	ArgsUsage: "NAME",
+	Usage:     "Delete a virtual node pool",
+	Action: func(cliCtx *cli.Context) error {
+		return fmt.Errorf("nodepool delete - not implemented")
+	},
+}
+
+var nodepoolListCommand = cli.Command{
+	Name:  "list",
+	Usage: "List virtual node pools",
+	Action: func(cliCtx *cli.Context) error {
+		return fmt.Errorf("nodepool list - not implemented")
+	},
+}
diff --git a/cmd/kperf/commands/virtualcluster/vc.go b/cmd/kperf/commands/virtualcluster/vc.go
new file mode 100644
index 0000000..f869f82
--- /dev/null
+++ b/cmd/kperf/commands/virtualcluster/vc.go
@@ -0,0 +1,15 @@
+package virtualcluster
+
+import "github.com/urfave/cli"
+
+// const namespace = "kperf-virtualcluster"
+
+// Command represents virtualcluster subcommand.
+var Command = cli.Command{
+	Name:      "virtualcluster",
+	ShortName: "vc",
+	Usage:     "Setup virtual cluster and run workload on that",
+	Subcommands: []cli.Command{
+		nodepoolCommand,
+	},
+}
diff --git a/go.mod b/go.mod
index 0326c7d..d414d58 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,6 @@ module github.com/Azure/kperf
 go 1.20
 
 require (
-	github.com/prometheus/client_golang v1.17.0
 	github.com/stretchr/testify v1.8.4
 	github.com/urfave/cli v1.22.14
 	golang.org/x/time v0.3.0
@@ -14,8 +13,6 @@ require (
 )
 
 require (
-	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/go-logr/logr v1.2.4 // indirect
@@ -24,13 +21,9 @@ require (
 	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/imdario/mergo v0.3.6 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16 // indirect
-	github.com/prometheus/common v0.44.0 // indirect
-	github.com/prometheus/procfs v0.11.1 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	golang.org/x/net v0.17.0 // indirect
diff --git a/go.sum b/go.sum
index 2ff18d9..e21baab 100644
--- a/go.sum
+++ b/go.sum
@@ -1,8 +1,4 @@
 github.com/BurntSushi/toml v1.3.2/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
-github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
-github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
-github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -17,7 +13,6 @@ github.com/go-openapi/jsonreference v0.20.2 h1:3sVjiK66+uXK/6oQ8xgcRKcFgQ5KXa2Kv
 github.com/go-openapi/swag v0.22.3 h1:yMBqmnQ0gyZvEb/+KzuWZOXgllrXT4SADYbvDaXHv/g=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
@@ -39,8 +34,6 @@ github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+o
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
-github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
-github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
@@ -49,14 +42,6 @@ github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjY
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.17.0 h1:rl2sfwZMtSthVU752MqfjQozy7blglC+1SOtjMAMh+Q=
-github.com/prometheus/client_golang v1.17.0/go.mod h1:VeL+gMmOAxkS2IqfCq0ZmHSL+LjWfWDUmp1mBz9JgUY=
-github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16 h1:v7DLqVdK4VrYkVD5diGdl4sxJurKJEMnODWRJlxV9oM=
-github.com/prometheus/client_model v0.4.1-0.20230718164431-9a2bf3000d16/go.mod h1:oMQmHW1/JoDwqLtg57MGgP/Fb1CJEYF2imWWhWtMkYU=
-github.com/prometheus/common v0.44.0 h1:+5BrQJwiBB9xsMygAB3TNvpQKOwlkc25LbISbrdOOfY=
-github.com/prometheus/common v0.44.0/go.mod h1:ofAIvZbQ1e/nugmZGz4/qCb9Ap1VoSTIO7x0VV9VvuY=
-github.com/prometheus/procfs v0.11.1 h1:xRC8Iq1yyca5ypa9n1EZnWZkt7dwcoRPQwX/5gwaUuI=
-github.com/prometheus/procfs v0.11.1/go.mod h1:eesXgaPo1q7lBpVMoMy0ZOFTth9hBn4W/y0/p/ScXhY=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
@@ -88,7 +73,6 @@ golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM=
 golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
 golang.org/x/oauth2 v0.8.0 h1:6dkIjl3j3LtZ/O3sTgZTMsLKSftL/B8Zgq4huOIIUu8=
 golang.org/x/oauth2 v0.8.0/go.mod h1:yr7u4HXZRm1R1kBWqr/xKNqewf0plRYoB7sla+BCIXE=
-golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
diff --git a/metrics/request.go b/metrics/request.go
index cd8840a..9811919 100644
--- a/metrics/request.go
+++ b/metrics/request.go
@@ -1,10 +1,10 @@
 package metrics
 
 import (
-	"fmt"
-	"sync/atomic"
-
-	"github.com/prometheus/client_golang/prometheus"
+	"container/list"
+	"math"
+	"sort"
+	"sync"
 )
 
 // ResponseMetric is a measurement related to http response.
@@ -12,53 +12,82 @@ type ResponseMetric interface {
 	// ObserveLatency observes latency.
 	ObserveLatency(seconds float64)
 	// ObserveFailure observes failure response.
-	ObserveFailure()
+	ObserveFailure(err error)
+	// ObserveReceivedBytes observes the bytes read from apiserver.
+	ObserveReceivedBytes(bytes int64)
 	// Gather returns the summary.
-	Gather() (latencies map[float64]float64, failure int, _ error)
+	Gather() (latencies []float64, percentileLatencies map[float64]float64, failureList []error, bytes int64)
 }
 
 type responseMetricImpl struct {
-	latencySeconds *prometheus.SummaryVec
-	failureCount   int64
+	mu            sync.Mutex
+	failureList   []error
+	latencies     *list.List
+	receivedBytes int64
 }
 
 func NewResponseMetric() ResponseMetric {
+	errList := make([]error, 0, 1024)
 	return &responseMetricImpl{
-		latencySeconds: prometheus.NewSummaryVec(
-			prometheus.SummaryOpts{
-				Namespace:  "request",
-				Name:       "request_latency_seconds",
-				Objectives: map[float64]float64{0: 0, 0.5: 0, 0.9: 0, 0.95: 0, 0.99: 0, 1: 0},
-			},
-			[]string{},
-		),
+		latencies:   list.New(),
+		failureList: errList,
 	}
 }
 
 // ObserveLatency implements ResponseMetric.
 func (m *responseMetricImpl) ObserveLatency(seconds float64) {
-	m.latencySeconds.WithLabelValues().Observe(seconds)
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	m.latencies.PushBack(seconds)
 }
 
 // ObserveFailure implements ResponseMetric.
-func (m *responseMetricImpl) ObserveFailure() {
-	atomic.AddInt64(&m.failureCount, 1)
+func (m *responseMetricImpl) ObserveFailure(err error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	m.failureList = append(m.failureList, err)
+}
+
+// ObserveReceivedBytes implements ResponseMetric.
+func (m *responseMetricImpl) ObserveReceivedBytes(bytes int64) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	m.receivedBytes += bytes
 }
 
 // Gather implements ResponseMetric.
-func (m *responseMetricImpl) Gather() (map[float64]float64, int, error) {
-	reg := prometheus.NewRegistry()
-	reg.MustRegister(m.latencySeconds)
+func (m *responseMetricImpl) Gather() ([]float64, map[float64]float64, []error, int64) {
+	latencies := m.dumpLatencies()
+	return latencies, buildPercentileLatencies(latencies), m.failureList, m.receivedBytes
+}
 
-	metricFamilies, err := reg.Gather()
-	if err != nil {
-		return nil, 0, fmt.Errorf("failed to gather from local registry: %w", err)
+func (m *responseMetricImpl) dumpLatencies() []float64 {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	res := make([]float64, 0, m.latencies.Len())
+	for e := m.latencies.Front(); e != nil; e = e.Next() {
+		res = append(res, e.Value.(float64))
 	}
+	return res
+}
+
+var percentiles = []float64{0, 50, 90, 95, 99, 100}
 
-	latencies := map[float64]float64{}
-	for _, q := range metricFamilies[0].GetMetric()[0].GetSummary().GetQuantile() {
-		latencies[q.GetQuantile()] = q.GetValue()
+func buildPercentileLatencies(latencies []float64) map[float64]float64 {
+	if len(latencies) == 0 {
+		return nil
 	}
 
-	return latencies, int(atomic.LoadInt64(&m.failureCount)), nil
+	res := make(map[float64]float64, len(percentiles))
+
+	n := len(latencies)
+	sort.Float64s(latencies)
+	for _, p := range percentiles {
+		idx := int(math.Ceil(float64(n) * p / 100))
+		if idx > 0 {
+			idx--
+		}
+		res[p] = latencies[idx]
+	}
+	return res
 }
diff --git a/metrics/request_test.go b/metrics/request_test.go
new file mode 100644
index 0000000..eb4ad27
--- /dev/null
+++ b/metrics/request_test.go
@@ -0,0 +1,48 @@
+package metrics
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBuildPercentileLatencies(t *testing.T) {
+	ls := make([]float64, 100)
+	ls[0] = 50
+	ls[1] = 49
+	ls[2] = 1
+	res := buildPercentileLatencies(ls)
+	assert.Equal(t, float64(0), res[0])
+	assert.Equal(t, float64(0), res[50])
+	assert.Equal(t, float64(0), res[90])
+	assert.Equal(t, float64(0), res[95])
+	assert.Equal(t, float64(49), res[99])
+	assert.Equal(t, float64(50), res[100])
+
+	ls = make([]float64, 1000)
+	ls[0] = 50
+	ls[1] = 49
+	ls[2] = -1
+	res = buildPercentileLatencies(ls)
+	assert.Equal(t, float64(-1), res[0])
+	assert.Equal(t, float64(0), res[50])
+	assert.Equal(t, float64(0), res[90])
+	assert.Equal(t, float64(0), res[95])
+	assert.Equal(t, float64(0), res[99])
+	assert.Equal(t, float64(50), res[100])
+}
+
+func TestResponseMetric(t *testing.T) {
+	c := NewResponseMetric()
+	for i := 100; i > 0; i-- {
+		c.ObserveLatency(float64(i))
+	}
+
+	_, res, _, _ := c.Gather()
+	assert.Equal(t, float64(1), res[0])
+	assert.Equal(t, float64(50), res[50])
+	assert.Equal(t, float64(90), res[90])
+	assert.Equal(t, float64(95), res[95])
+	assert.Equal(t, float64(99), res[99])
+	assert.Equal(t, float64(100), res[100])
+}
diff --git a/request/schedule.go b/request/schedule.go
index f2a216e..f2925a8 100644
--- a/request/schedule.go
+++ b/request/schedule.go
@@ -3,6 +3,7 @@ package request
 import (
 	"context"
 	"io"
+	"log"
 	"math"
 	"sync"
 	"time"
@@ -16,6 +17,8 @@ import (
 
 const defaultTimeout = 60 * time.Second
 
+var m sync.Mutex
+
 // Schedule files requests to apiserver based on LoadProfileSpec.
 func Schedule(ctx context.Context, spec *types.LoadProfileSpec, restCli []rest.Interface) (*types.ResponseStats, error) {
 	ctx, cancel := context.WithCancel(ctx)
@@ -62,10 +65,15 @@ func Schedule(ctx context.Context, spec *types.LoadProfileSpec, restCli []rest.I
 						defer respBody.Close()
 						// NOTE: It's to reduce memory usage because
 						// we don't need that unmarshal object.
-						_, err = io.Copy(io.Discard, respBody)
+						bytes, err := io.Copy(io.Discard, respBody)
+						if err != nil {
+							log.Fatal("error completing io.Copy()", err)
+						}
+						respMetric.ObserveReceivedBytes(bytes)
 					}
+
 					if err != nil {
-						respMetric.ObserveFailure()
+						respMetric.ObserveFailure(err)
 					}
 				}()
 			}
@@ -79,15 +87,12 @@ func Schedule(ctx context.Context, spec *types.LoadProfileSpec, restCli []rest.I
 	wg.Wait()
 
 	totalDuration := time.Since(start)
-
-	latencies, failures, err := respMetric.Gather()
-	if err != nil {
-		return nil, err
-	}
+	_, percentileLatencies, failureList, bytes := respMetric.Gather()
 	return &types.ResponseStats{
-		Total:     spec.Total,
-		Failures:  failures,
-		Duration:  totalDuration,
-		Latencies: latencies,
+		Total:               spec.Total,
+		FailureList:         failureList,
+		Duration:            totalDuration,
+		TotalReceivedBytes:  bytes,
+		PercentileLatencies: percentileLatencies,
 	}, nil
 }